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Public ownership evidence

Insmed, Inc. (INSM) Ownership Disclosures

Read INSM insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-14T02:54:47.600Z

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2026-09-112026-09-09Brennan David RS25,000Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-09 and its public availability date is 2026-09-11. Subtracting those calendar dates gives 2 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

Recent Form 4 activity

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2026-09-112026-09-09Brennan David RS25,000Not reported
2026-08-202026-08-17SHAROKY MELVIN MDS5,000Not reported
2026-08-132026-08-10Adsett RogerS239,850Not reported
2026-08-082026-08-06Flammer Martina M.D.S18,278Not reported
2026-08-082026-08-06Flammer Martina M.D.S8,895Not reported
2026-07-252026-07-23Lewis WilliamS5,872Not reported
2026-07-252026-07-23Lewis WilliamS4,828Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-06-302026-08-2913$1,386None
Corient Private Wealth LP2026-06-302026-08-2823,987$2,557,566None
Corient Private Wealth LP2026-06-302026-08-283,031$323,165None
Principia Wealth Advisory, LLC2026-06-302026-08-277$746None
Principia Wealth Advisory, LLC2026-03-312026-08-279$1,472None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25304,798$32,497,563None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2532,497,563$304,798,000None
Assenagon Asset Management S.A.2026-06-302026-08-22218,270$23,271,947None
Palo Alto Investors LP2026-06-302026-08-20413,980$44,138,548None
Kingsview Wealth Management, LLC2026-06-302026-08-202,147$228,913None
CANTOR FITZGERALD, L. P.2026-06-302026-08-2025,000$2,665,500Put
CANTOR FITZGERALD, L. P.2026-06-302026-08-2025,000$2,665,500None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-204,807$512,540None
Palo Alto Investors LP2026-06-302026-08-19413,980$44,138,548None
Ensign Peak Advisors, Inc2026-03-312026-08-19499,756$81,720,101None
Ensign Peak Advisors, Inc2025-12-312026-08-19382,202$66,518,436None
Ensign Peak Advisors, Inc2025-09-302026-08-19642,034$92,459,316None
Livforsakringsbolaget Skandia, Omsesidigt2026-06-302026-08-192,912$208,470None
Livforsakringsbolaget Skandia, Omsesidigt2026-06-302026-08-191,500$159,915None
Rakuten Investment Management, Inc.2026-06-302026-08-1912,109$1,268,296None
MASTERINVEST Kapitalanlage GmbH2026-06-302026-08-184,640$494,717None
Palo Alto Investors LP2026-06-302026-08-18413,980$44,138,548None
Caitlin John, LLC2026-06-302026-08-1810$1,066None
Corient Private Wealth LP2026-06-302026-08-1828,011$2,986,583None
Empowered Funds, LLC2026-06-302026-08-183,899$415,711None
Empowered Funds, LLC2026-06-302026-08-18749$79,858None
Empowered Funds, LLC2026-06-302026-08-18147$15,673None
Transamerica Financial Advisors, LLC2026-06-302026-08-18977$104,167None
UNITED CAPITAL FINANCIAL ADVISORS, LLC2026-06-302026-08-182,284$243,520None
Stonepine Capital Management, LLC2026-06-302026-08-1840,000$5,600,000Call
Jefferies Financial Group Inc.2026-06-302026-08-18105,400$11,237,748Put
Jefferies Financial Group Inc.2026-06-302026-08-189,896$1,055,112None
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO2026-06-302026-08-1861,152$6,520,026None
Ishara Investments LP2026-06-302026-08-1551,250$5,464,275None
EFG International AG2026-06-302026-08-155,363$571,803None
EFG International AG2026-06-302026-08-1515,141$1,614,333None
EFG International AG2026-06-302026-08-15533$56,927None
EFG International AG2026-06-302026-08-1527,289$2,909,826None
EFG International AG2026-06-302026-08-152,615$278,811None
Defilade Capital Management, L.P.2026-06-302026-08-15281,838$30,049,568None
Trails Edge Capital Partners, LP2026-06-302026-08-15230,331$24,557,891None
Limestone Investment Advisors LP2026-06-302026-08-155,000$533,100Put
Limestone Investment Advisors LP2026-06-302026-08-155,000$533,100Call
Limestone Investment Advisors LP2026-06-302026-08-151,160$123,679None
Investors Portfolio Services LLC2026-06-302026-08-153$320None
DARK FOREST CAPITAL MANAGEMENT LP2026-06-302026-08-159,356$997,537None
AMERIFLEX GROUP, INC.2026-06-302026-08-1511$1,173None
Synergy Investment Management, LLC2026-06-302026-08-1550$5,156None
TORONTO DOMINION BANK2026-06-302026-08-1528,611$3,050,505None
SummitTX Capital, L.P.2026-06-302026-08-1518,751$1,999,232None

90-day public filing window, up to 50 source positions.

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.